Spinnaker-boom standard



(No Model!) F. J. GEVALT.

SPINNAKER BOOM STANDARD.

No. 413,046. Patented Oct. 15, 1889.

UNITED STATES Parana rrrcn.

FREDERIC J. GEVALT, OF CHELSEA, MASSACHUSETTS.

SPINNAK1ER-BOOM STANDARD.

SPECIFICATION forming part of Letters Patent No. 413,046, dated October 15, 1889. Application filed February 4, 1889. Serialllo. 298,558. (No model.)

To aZZ whom it may concern:

' Be it known that I, FREDERIO J. GEVALT, a citizen of the United States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Spi11naker-l3oon1 Standards 5 and I do hereby declare the fol lowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in spinnaker-boom standards and device for operating the spinnaker-boom on yachts and sailing-vessels; and it is carried out as follows, reference being had to the accompanying drawings, wherein' Figure 1 represents a side elevation of a vessel, showing the spinnakenboom held in an upright and inoperative position. Fig. 2 represents a front view of the improved standard and the lower portion of the spinnakerboom. Fig. 3 represents a central longitudinal section of the invention, showing the mast in elevation; and Fig. a represents a plan view of the invention, showingthe spinnakerboom as swung outward in position for using the spinnaker.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

In Fig. l, a represents a yacht or sailingvessel, on which b is the mast, and h the topmast, c and (Z the fore and top mast stays, and e the bowsprit, as usual.

F represents the spinnaker boom, which, when the spinnaker is not in use, is hoisted to an upright position in front of the mast, its upper end projecting above the place where the forestay c is attached to the mast and to one side of said forestay, as shown in Fig. 1. When a spinnaker is used, it has to be shifted from the port to the starboard side of the vessel, according to the direction in which the vessel is sailing, or according to changes of the wind, and to do this it is necessary to lower the spinnaker-boom sufficiently to permit its upper end to pass below the forestay c, which is usually accomplished by pushing the lower end of the spinnakerboom outside of the vessel until the upper end is sufficiently lowered to go free of the forestay, after which the said spinnaker-boom is placed in its new position on the opposite side of the vessel. This manner of operating a spinnaker-boom is objectionable, as it requires a great deal of often valuable time in making changes from port to starboard, or vice versa, and also because the lower end of the boom has to be passed outside of the vessel, causing it often to drag in the water, and thereby impeding the speed of the vessel.

My invention is constructed and arranged in such a manner that the spinnaker-boom can be changed from one side to the other of the vessel in a very quick time and without the need of bringing the lower end of the boom outside of the vessel when making such change, and for this purpose my inventionis as shown in Figs. 2 and 3, and Iprefer to connect the lower end of said standard to the said lower bearing or step g in such a manner that it may be freely rotated around its axis without getting detached from such lower step or bearing. To the upper end or head of said standard is pivoted, preferably by means of a pin or screw g",the metal ring h, adapted to receive the spinnaker-boom F, as shown in Figs. 1, 2, and 3. In a recess in the side of the lower part of the boom F is pivoted the latch or pawl f, (shown in Figs. 3 and 4,) which, when swung outward, as shown, rests on the ring' 71 thus preventing the boom from passing through the said ring, exceptthat portion of it which is guided in such ring, as shown. in Fig. 3. In front of the standard 9 is made through the deck A a dead light perforation A, somewhat larger in diameter than the boom F, which perfora tion is ordinarily covered by means of suit able dead-1i ght, the latter being, however, not

shown in the drawings. Said hole A serves for the purpose of receiving the lower end of the boom F, that is passed through it in changing the posit-ion. of the said boom from one side of the vessel to the other. The boom F is hoisted, lowered, and held in its upright position by means of the rope 7t and pulleys Z Z, one of which is suspended from the mast at or near the place where the forestay is secured, and the other one connected to the boom F, preferably by means of a ring or strap adapted to turn around said boom, but prevented from moving longitudinally thereon. The lower end of the rope 7c is suitably secured to the saddle b or other part of the vessel after the boom has been hoisted to the upright position shown in Fig, 1. In practice I prefer to support the standard g near its upper end by means of a ring m, in which said standard is journaled above the bearing If, such ring being secured in position by means of the metal rods or braces m m, having their upper ends secured to said bearing-ring and their lower ends secured in a suitable manner to the saddle b, as shown in Figs. 1, 2, and 3.

The operation is as follows: When the spinnaker is not used, its boom F is hoisted and secured in the upright position in front of the mast, as shown, its lower end being guided in and supported on the standard-ring h by the latch f, as shown in the drawings. In shifting the boom from one side of the vessel to the other, it is first hoisted up sufliciently to allow the latch f to drop into the recess in the side of the boom, after which the latter is lowered into and through the dead-light hole A, until its upper end is clear of the forestay a, when such upper end is passed under said forestay, the boom hoisted, and the latch f placed in positiomas shown, after which the boom may be swung into working position as may be desired, and held in such position by the usual stays. \Nhen the spinnaker-boom is not in use, the standard g may be turned half a revolution around its axis, so as to bring the boom F still closer up to the mast b, if so desired.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by Letters Patent and claim 1. The standard g, having the lower step g, middle bearing b and upper bearing an, secured by means of braces m m to the mastsaddle and having pivoted to its upper end the ring 71, combined with the spinnakenboom F, sliding therein, and means for hoisting, lowering, and supporting the same, substantially as and for the purpose set forth.

2. The spinnaker-boom F, adapted to slide in the ring it, pivoted to the standard g, said standard being supported in bearings in which it can rotate, and said boom having means for lowering it through a deck-hole while changing its position from one side of the vessel to the other, as specified.

3. In combination, astandard journaled in bearings in which it is rotatable, a spinnaker-boo 11 ring pivoted to said standard, a spinnaker-boom adapted to slide and to be supported in said ring, and a deck-perfora tion for receiving the spinnaker-boom while its position is being changed, substantially as and for the purpose set forth.

In testimony whereof I have affixed my sig nature in presence of two witnesses.

, FREDERICJ. GEVAL'I.

\Vitnesses:

ALBAN ANDREN, ADDISON S. Houses. 

